Answer:
The tip would be $4.63 unless you round it to $5
Step-by-step explanation:
[tex]\Delta C=2\pi(r_2-r_1)\\ \\ \Delta C=2\pi(6400001-6400000)\\ \\ \Delta C=2\pi\\ \\ \Delta C\approx 6.283m\\ \\ \text{So taking off 6 meters is reasonable.}[/tex}
400
12 / 0.03
Divide 12 by 3 = 4.
Move the decimal place over 2 to the right.
400.
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